1587288649 has 2 divisors, whose sum is σ = 1587288650. Its totient is φ = 1587288648.

The previous prime is 1587288613. The next prime is 1587288707. The reversal of 1587288649 is 9468827851.

It is a happy number.

It is an a-pointer prime, because the next prime (1587288707) can be obtained adding 1587288649 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1091113024 + 496175625 = 33032^2 + 22275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1587288649 - 2¹⁷ = 1587157577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1587288593 and 1587288602.

It is not a weakly prime, because it can be changed into another prime (1587238649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 793644324 + 793644325.

It is an arithmetic number, because the mean of its divisors is an integer number (793644325).

Almost surely, 2^1587288649 is an apocalyptic number.

It is an amenable number.

1587288649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1587288649 is an equidigital number, since it uses as much as digits as its factorization.

1587288649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 58.

The square root of 1587288649 is about 39840.7912697527. The cubic root of 1587288649 is about 1166.5015051730.

The spelling of 1587288649 in words is "one billion, five hundred eighty-seven million, two hundred eighty-eight thousand, six hundred forty-nine".